Good morning, everyone. Today, I want to discuss the impact of urban green spaces on mental health. A recent study conducted in Melbourne followed 1,000 residents over five years. The researchers measured their exposure to parks and gardens, and also assessed their stress levels via questionnaires. Surprisingly, the size of the green space mattered less than its quality. Specifically, spaces with diverse plant life and quiet areas reduced stress more effectively than large, empty lawns. Moreover, the benefit was strongest for people who visited these spaces at least three times a week. So, it's not just having green areas, but how they are designed and used that counts.
❓ According to the lecture, what factor most significantly reduced stress in the study?